\On what you say I would say, I would suggest very generally he has most likely been charged with a couple of offences which would be something like Assault Occasioning Actual Bodily Harm (possibly with a backup of Common Assault) and Stalk Intimidate.
You cannot make sure he goes to gaol. He is entitled to his presumption of innocence until he pleads or is found guilty. If he pleads guilty the AVO will be made as a matter of course. He will also get a discount on the penalty that will be imposed. Depending on what his criminal history looks like, he can face a range of sanctions from Good Behaviour Bonds to Gaol in the Community to Custodial Gaol.
If he chooses to plead not guilty, a brief will be served and there will possibly be a defended hearing although many people plead out on the day of court.
If he contacts you, it might well be a breach of the AVO...you have not been clear about the terms. I would be calling the police. Get in touch with them anyway and ask what is going on.